Furnace



y T. w. CLARK 1,769,053

FURNACE Filed July 16 1926 2 Sheets-Sheet l 1 N VEN TOR.

A TTORN 1W5.

T. W. CLARK July 1, 1930.

FURNACE Filed July 16 1926 Q 2 SheatsSheet 2" INVENTOR. 772604011 U C/ar/C Midi;

.-1 TTORNEYE Patented July 1 1930 UNITED STATES PATENT ,oFFIcE THEODORE w. CLARK, or CHICAGO, ILLINOIS, nssrenos :ro THE s'rnone, GARLISLE AND HAMMOND COMPANY, or CLEVELAND, orrro, A oonronn'rrou or OHIO summon Application filed July 16,

This invention relates to heat-treating, and more particularly heat-treating metals in a liquid bath, and it is among the objects of the invention to provide a liquid bath maintained at a desired temperature and equipped with meansfor conveniently exposing articles to be treated therein for a regulated period. Other objects and advantages will appear as the description proceeds. v

To theaccomplishment of the foregoingv and related ends, the invention, then, consists of the features hereinafter fully described, and particularly pointed out in the claims, the annexed drawings and the following description setting forth in detailcertain procedure and structure embodying the invention, such disclosed steps and means constituting, however, but a few of various forms in which the principle of the invention may be used.

In said annexed drawings:

Fig. 1 is a plan view of a construction in accordance with the present invention; and Fig. 2 is a front elevation, parts being broken away. j

In its general aspects, the invention involves a heated liquid bath, having among other details, means for maintaining a circulation of the liquid, and provision for holding articles in such bath for a regulated. and adjustable period oftime.

A container 1, preferably well jacketed with heat-insulation 2 and having a hood '3, is arranged to receive a liquid medium,

for example oil, and is heated by suitable means, most conveniently electric heating units l connected to a feed line in any usual manner. Mounted to circulate the liquid is a stirrer or circulator 5, advantageously of screw propeller type. The circulator may be drivenv by a shaft 6 geared or belted to a source of power, for instance a motor 7. Surrounding the shaft 6 and journaled in the framing 8 is a sleeve-shaft 9 to which is secured a carrier. 10 from which the articles to be treatedmay be suspended in the bath. The detail of the carrier and its actuating mechanism may vary within certain lines, but as a convenient form, it will 1926'. Serial u 122,344..

ordinarily be of horizontal revoluble type.

The carrier is revolved by a suitable regulating or J timing gear. A desirable arrangement comprises a motor 11 which may run atja desired constant'speed and which is geared down to" the shaft l2'having adjustable cones and a belt 13 running on these and similar cones ofthe shaft 14;. The shaft 14 is geared down to the shaft 1 5 which by further reduction gearing,: for instance of worm type, drives the sprocket 16, and a chain 17 connects the latter to the sprocket 18 on the shaft 19 which through gearing 20 turns the sleeve-shaft 9 and the attached carrier 10. The articles to be treated may be hung from the carrier 10 by means of hooks or clamps in accordance with the particular form of articles being handled.

In operation, the bath of oil or other liquid which is to be employed is brought 1 to the requisite temperature, for drawing or tempering for instance, as the case may be, andthe circulator being put in operation, the liquid is so distributed in relation to the heaters thata substantially uniform temperature is obtained throughout the mass. Articles to be treated are introduced into the bath, being positioned or suspended from the carrier as it revolves, and from a station at the front opening of the hood, an operator can remove articles which have been through the bath, and refill the carrier in sequential order so as to thereby maintain a continuous cycle of feed and discharge. In accordance with the particular treatment, whether drawing or tempering or the like, and dependent also upon the size of the articles, the rate of travel of the 1 being made as regards the features disclosed, provided the steps or means stated in any of the following claims or the equivalent of such stated steps or means be employed.

I therefore particularly point out and distinctly claim as my invention 1. In apparatus of the character described, the combination of a liquid container, meansfor heating liquid in said container, a circulating propeller in said container, a carrier for supporting articles to be treated in said container, means for driving said propeller and independent and regulatable means for driving said carrier.-

2. In apparatus of the character described, the combination of a liquid con-. tainer, electric heating units in said container, a circulating propeller for the liquid in the container, a rotatable carrier for supporting articles to be treated in said container, means for rotating said propeller at a constant speed, independent means for driving said carrier, and means for adjustin the rate of rotation of said carrier.

igned my me this 7th day of July, 1926. 1 THEODORE W. CLARK. 

